Automatic writing-machine.



F. P. MAIN,

AUTOMATIC WRITING MACHINE.

APPLICATION FILED JULY 3, 1907.

l ,034, 1 3 1 Patented July 30, 1912.

2 SHEETS-SHEET 1.

I am,

I'. I'. MAIN.

AUTOMATIC WRITING MACHINE.

APPLIGATION FILED JULYs, 1901.

'1,034,131 Patentedy July 30,1912.

2 SHEETS-SHEET 2.

of the letter. It will furthermore-.be observed that by the rotation of the' trackerboard tl'ife` fusing ofthe Contact 'ngers'there-- lwith is "prevent'ed, this ditli'culty vfrequently arisingfrom stoppage. -`Hitherto this fusing hasjcontinued, in many cases,i until the' lingers and the roll were separated by the edge of' a perforation .whereby the' sheets were often torn. By having the. contact ,rolls serve as the driving rolls, the members are positively separated before ltheedge of a perforation can be reached; l Having' thus fully describedv my invention what I claim as new and desire to secure by Letters Patent is 1. In combination'with a typewriti'ng machine and the key barsthereof, a common contact roll, a perforated sheet engaging over said roll, a centrally pivoted' lever for each key bar, a rotatable wheel .on one\ endpoieach leverV engaging said contact roll, a

bpringsconnected to the opposite-end of each' lever, a solenoid for each key bar,'a core yWorking in each solenoid, a spring connected to. eaeh'leore and to `a suitable stationary point soa-s to resiliently support each core, a connection between each core and the free end ofe`ach ofsaid key bars, and an I electrical circuitincluding vthe solenoids,

said common roll andthe rotatable wheels of vsaid leyers. p

'-2. Incfimbination'with thekey bar of a typewrlitr machine, a solenoid foreach vkey bar,1 a lcore for each solenoid, a coil spring for each core connected at one lend to said .core and at -its opposite end to a suitable .stationary p Omt, a connection between each `core and key bal-,and means to energize each solenoid.

' 3. In combina-tion with a Writingmrna-v chine, a pair ot rolls each driving a perf;

rated sheet passingthereover and serving as contact-Tolls, one o'fsaid sheets being for the purpose'of ei'ecting printing 'of the.

envelops and the other sheet being for the 'bet'weeii said gears' to operate 'either while f the/.other remains quiescent. v V 5*.4; Inmom'bination with a writing machine, a' pair of rollseach'driving a perforated sheet passing thereover and serving as contact rolls, one of said sheetsbeing for the purpose .of eectin printingof the envelops and 'the other s eet being'nr the purpose of eiecting printing of letters, and means. normally operated to have rotary movement for rotatingeaeh of said rolls, said 'means being shiftable from one lroll to they other to cause actuation of one while the other remains quiescent.

5. 'Anyautomatic recording machine comrising keys, electrically operated means ihr operating said keys, a roll for driving a vmaster sheet,- and in'circuit with. said means, and spring controlled lingers contacting With the' roll through the performy energized by circuit closing means operi ated by a master sheet, and spring supports for.' carrying saidl cores lindependcnt ot said keys, whereby the pull of the core is effective at the last instant of its travel.

7. An automatic recording machine, com prising keys, solenoid magnets, means for connecting said keys to the cores ci' said magnets, and lyieldable means for normally relievingthevkeys of the weight of said core'.

l FRED F. MAIN. Vitnesses H. V. MAIN;

R. F. MAIN. 

